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Chapter 25: MS Environmental Problems

Difficulty Level: At Grade Created by: CK-12

It was a sunny afternoon when this picture was taken, but you’d never know it. Noxious smoke from a steel plant filled the air and obscured the sun. The picture was taken in Houston, Texas, in 1972. Since then, laws have been passed in the U.S. to reduce air pollution. However, air pollution is still a major environmental problem.

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Grades:
7 , 8
Date Created:
Jan 22, 2015
Last Modified:
Nov 03, 2015
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